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{801a8bdd-505f-407c-9886-07fc47d556b0}w64.sys

squirrelweb

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {801a8bdd-505f-407c-9886-07fc47d556b0}w64.sys by squirrelweb has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a Windows 64-bit kernel mode device driver named “{801a8bdd-505f-407c-9886-07fc47d556b0}w64”.
Publisher:
StdLib  (signed by squirrelweb)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
98217f56bb1e1573c575036606d2d061

SHA-1:
5bcb189059e27ac90fde52165397d309bced6ce1

SHA-256:
1d2b94a8a0c36c74c2ef83c94c2ad43813bb246ebd6663b3de775276b7357be4

Scanner detections:
1 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
12/23/2024 5:05:08 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.18.18

File size:
43.7 KB (44,736 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{801a8bdd-505f-407c-9886-07fc47d556b0}w64.sys

Digital Signature
Signed by:
squirrelweb

Authority:
VeriSign, Inc.

Valid from:
10/7/2013 2:00:00 AM

Valid to:
10/8/2014 1:59:59 AM

Subject:
CN=squirrelweb, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=squirrelweb, L=San Diego, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
7244DFB846B028B3B64BA8B4A757EAA4

File PE Metadata
Compilation timestamp:
9/13/2014 1:33:02 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

Entry address:
0xB064

Entry point:
48, 83, EC, 28, 4C, 8B, C2, 4C, 8B, C9, E8, 95, FF, FF, FF, 49, 8B, D0, 49, 8B, C9, 48, 83, C4, 28, E9, C6, 60, FF, FF, CC, CC, 38, B2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, B6, 00, 00, 60, 81, 00, 00, 28, B1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, B9, 00, 00, 50, 80, 00, 00, D8, B0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, BA, 00, 00, 00, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 9A, BA, 00, 00, 00, 00, 00, 00, 86, BA, 00, 00...
 
[+]

Code size:
30.5 KB (31,232 bytes)

Driver
Display name:
{801a8bdd-505f-407c-9886-07fc47d556b0}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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